He said, "Donald Trump has told literally thousands of lies since he began his campaign, and since he has been in the White House.

But the biggest lie that he told the people of Pennsylvania and the people of Vermont and people all across this country, the biggest lie, was that he was gonna stand up for working families and take on the establishment.

That was a monstrous lie." The senator from Vermont has led the field of Democratic contenders in fundraising so far in 2019, raising $18.2 million in the first quarter.

Sanders' campaign said it received an average donation of $20 during the first quarter.